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      07-26-2012, 03:02 PM   #5
bradh2238
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Drives: 2013 BMW X6 M
Join Date: May 2012
Location: Denver

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I can't speak to the x6 50, but I have had several other cars where I made modifications or used a tuner to increase HP an extra 10%. Without question it is noticeable. Not slam you back into your seat noticeable, but I guarantee if you drive the same car without the M performance package, you would notice a difference.
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